制氢转化炉上尾管加强接头频繁开裂原因分析及对策  

CAUSE ANALYSIS OF FREQUENT CRACKING OF UPPER TAIL PIPE OF HYDROGEN PRODUCTION REFORMER AND COUNTERMEASURES

作　　者：吕红霞[1] 潘晓明 Lyu Hongxia;Pan Xiaoming(SINOPEC Cangzhou Company,Cangzhou,Hebei,061000)

机构地区：[1]中国石油化工股份有限公司沧州分公司,河北沧州061000

出　　处：《石油化工设备技术》2024年第4期39-44,I0003,共7页Petrochemical Equipment Technology

摘　　要：某炼化企业制氢转化炉2010年升级改造后,不同炉管的加强接头与上尾管焊口位置先后出现了5次开裂,造成制氢装置非计划停工。通过对运行环境、高温氢腐蚀、热膨胀应力、结构应力、异种钢焊接、弹簧支吊架等多方面开展深入分析,发现泄漏的原因主要是加强接头与上尾管连接焊缝局部高应力区发生了应力松弛开裂,同时,工艺参数控制不严格加遽了开裂速度。2021年通过实施炉管材质升级、稳定工艺运行环境、严控施工质量等措施,没有再出现过开裂的情况,彻底消除了炉管运行过程中的安全隐患,保障了设备的本质安全和装置的长周期运行。After the reformer for hydrogen production in certain refining enterprise was upgraded and revamped in 2010,five cracks have occurred in the reinforced joints of different furnace tubes and in the weld junction of the upper tail pipe,resulting in unplanned shutdown of the hydrogen production plant.Through in-depth analysis of the operating environment,high-temperature hydrogen corrosion,thermal expansion stress,structural stress,dissimilar steel welding,spring support hangers,etc.,it was found that the leakage was mainly due to the stress relaxation cracking in the local high-stress area of the weld connecting the reinforced joints and the upper tail pipe,and meanwhile,the process parameters were not strictly controlled,which increased the cracking speed.In 2021,through the implementation of furnace tube material upgrading,stabilization of process operating environment,strict control of construction quality and other measures,there has been no more cracking;the safety hazards during the operation of the furnace tube have been completely eliminated;and the intrinsic safety of the equipment and the long-cycle operation of the device have been guaranteed.

关 键 词：炉管 异种钢焊接 结构应力 接头开裂 材质升级 

分 类 号：TQ116.2[化学工程—无机化工]